O’Brien’s Bridge, [150], [261], [266]

O’Byrne, Brian MacPhelim, [18]

— Hugh MacPhelim, [18]

— Philip MacPhelim, [295]

O’Byrnes, various, [173]

O’Connolly, Owen, [20], [57]

O’Connor, Teige, [95]

— Roe, [10]

O’Conor or O’Connor, Felix, [301], [302]

O’Donovan, [38]